who has a T4 turbo? help needed
06-12-2009, 05:45 PM
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who has a T4 turbo? help needed
i have a little problem with my t4 turbo on my car.
when it come back from msd there was a problem with the turbo and boost. it would'nt boost any more that 30psi (even with the pipe off the turbo).
its a brand new -31 they fitted for me.
i have had it looked at by vince @ cr turbos and he could'nt find anything wrong. he did clean a couple of the surfaces so the where 100% flat.
i've tried the turbo again and it still won't boost any more than 30psi.
so does anyone have a t4 turbo with an enlarged wastegate penny to try my actuator to see what boost it will produce on another t4?
i will cover all costs on postage both ways
06-12-2009, 05:50 PM
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why not just try a -34 actuator instead ???
06-12-2009, 05:54 PM
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i really dont understand this mate it held 2.2 bar all day long on my car with the original actuator on aswell.
06-12-2009, 06:02 PM
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maybe the spec of your engine is holding back the boost?think mine holds 32psi
06-12-2009, 06:03 PM
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but i have always wondered why a -31 is on mine as well rather then a -34?
06-12-2009, 06:03 PM
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06-12-2009, 06:10 PM
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i've got a -34 if u wana try it.......
06-12-2009, 06:11 PM
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Mine has a -31 on it but is still on a safe map only boosting 24psi till i get it live mapped.
06-12-2009, 06:12 PM
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Quote:
Originally Posted by
t4 and greys
why not just try a -34 actuator instead ???
i have and it boost's over 40psi but msd told me should boost 40-45psi with there -31
06-12-2009, 06:12 PM
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Quote:
Originally Posted by
mechanic28
but i have always wondered why a -31 is on mine as well rather then a -34?
....just cos its got a bigger number on it doesnt mean its better.......
06-12-2009, 06:13 PM
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Quote:
Originally Posted by
pete mcrash
....just cos its got a bigger number on it doesnt mean its better.......
i know that,but it would make it easier for the boost control to hold more boost!
06-12-2009, 06:14 PM
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Quote:
Originally Posted by
pete mcrash
i've got a -34 if u wana try it.......
i have one mate and it boosts more but they told me there's something wrong with my turbo
06-12-2009, 06:15 PM
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Quote:
Originally Posted by
Charlie Chalk
Exhaust man enough?
i believe so. 3" all the way through
06-12-2009, 06:18 PM
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just lock the wastegate shut somehow or other.. if it still wont go above 2bar then there its not the actuator...
06-12-2009, 06:27 PM
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Quote:
Originally Posted by
scoooby slayer
i really dont understand this mate it held 2.2 bar all day long on my car with the original actuator on aswell.
that must have been a -34 because it feels stronger than the -31 but thats knackered now.
06-12-2009, 06:29 PM
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Quote:
Originally Posted by
mechanic28
maybe the spec of your engine is holding back the boost?think mine holds 32psi
what would do that?
06-12-2009, 06:30 PM
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head/cams inlet plenum etc
06-12-2009, 06:30 PM
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Quote:
Originally Posted by
pee vee
just lock the wastegate shut somehow or other.. if it still wont go above 2bar then there its not the actuator...
i can get it to boost more with my -34 but msd told me there's something wrong with my turbo if it won't boost more than 30psi with a -31?
06-12-2009, 06:32 PM
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Quote:
Originally Posted by
mechanic28
head/cams inlet plenum etc
have you ever tried you car with your turbo pipe removed to see what yours boost's with a -31?
06-12-2009, 06:57 PM
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if a -34 cures it then get it on and drive it mate. who cares why as long as it works pal
06-12-2009, 06:57 PM
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my t4 from vince hold 34psi and rest asure if vince says there is nought wrong with your turbo theres nothing wrong with it
06-12-2009, 07:05 PM
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Quote:
Originally Posted by
B13 JUS
i can get it to boost more with my -34 but msd told me there's something wrong with my turbo if it won't boost more than 30psi with a -31?
how can it be the turbo if it boosts more with the -34 on it.
06-12-2009, 07:07 PM
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Quote:
Originally Posted by
scoooby slayer
if a -34 cures it then get it on and drive it mate. who cares why as long as it works pal
i can drive it the way it is but it has been mapped with the air injectors fully open on a -31, stu said its not the best way to have it.
if i put the -34 on it will boost more and its only been mapped upto 30psi so stu told me it will be unsafe to run more.
i am trying to get in sorted for the next mapping session
06-12-2009, 07:10 PM
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Quote:
Originally Posted by
dave cos4x4
how can it be the turbo if it boosts more with the -34 on it.
no sure mate but stu told me theres a problem and so did james
https://passionford.com/forum/genera...r-produce.html
06-12-2009, 07:11 PM
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so whats the lowest the -34 can be set too,surely it cannot be more the 30 psi.
06-12-2009, 07:11 PM
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Quote:
Originally Posted by
cossiedave
my t4 from vince hold 34psi and rest asure if vince says there is nought wrong with your turbo theres nothing wrong with it
what actuator have you got and how much preload?
06-12-2009, 07:15 PM
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a -31 is all you need on a t4
06-12-2009, 07:17 PM
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Quote:
Originally Posted by
Turbosystems
a -31 is all you need on a t4
Enough said.....
.
Steve
06-12-2009, 07:17 PM
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Quote:
Originally Posted by
B13 JUS
have you ever tried you car with your turbo pipe removed to see what yours boost's with a -31?
no mate i have only driven her home so far
i presume your cam timing is spot on?
06-12-2009, 07:22 PM
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Quote:
Originally Posted by
mechanic28
no mate i have only driven her home so far
i presume your cam timing is spot on?
yeah msd checked it and moved the exhaust cam 1 tooth as it was out
06-12-2009, 07:24 PM
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Quote:
Originally Posted by
Turbosystems
a -31 is all you need on a t4
what boost have you seen a -31 produce on a t4 with a hole of preload?
vince did say my -31 opened a little earlier than a garret -31 but should'nt be a problem
06-12-2009, 07:25 PM
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what cams you running?what your c/r bud
06-12-2009, 07:31 PM
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so you don't have a garret -31 you have a mickey mouse one then
-31 refers to a genuine garret one only as does -34 the fact that somecompany has chosen to put -31 on their actuator does not make it a garret -31
we only use genuine garret parts
heinz don't make beans for any one else either
without any pneumatic control pressure on the actuator on a genuine t4 turbine housing with the correct size by passport and penny you will see pressures at peak load over 5 bar
we have of late seen quite a few t4's with the wrong size by pass port and waste gate penny
06-12-2009, 07:39 PM
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Quote:
Originally Posted by
mechanic28
what cams you running?what your c/r bud
bd14 inlet and standard ex cams
standard c/r
06-12-2009, 07:45 PM
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Quote:
Originally Posted by
Turbosystems
so you don't have a garret -31 you have a mickey mouse one then
-31 refers to a genuine garret one only as does -34 the fact that somecompany has chosen to put -31 on their actuator does not make it a garret -31
we only use genuine garret parts
heinz don't make beans for any one else either
without any pneumatic control pressure on the actuator on a genuine t4 turbine housing with the correct size by passport and penny you will see pressures at peak load over 5 bar
we have of late seen quite a few t4's with the wrong size by pass port and waste gate penny
my pass port has been enlarged but vince told me everything measure up fine, as he did clean it up as the edge's where a little rough
what to you me by (without any pneumatic control pressure on the actuator)?
even with my -34 it won't produce 5 bar or boost.
any suggestions tony whats wrong?
06-12-2009, 07:53 PM
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Im sure I've heard this story before
06-12-2009, 08:51 PM
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id just buy a brand new genuine garret -31 and try that mate
06-12-2009, 08:55 PM
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maybe that set up cant shift the air quick enough to boost anymore?
06-12-2009, 09:04 PM
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06-12-2009, 09:08 PM
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Quote:
Originally Posted by
milkman
Im sure I've heard this story before
I wondered when you two would start...
Quote:
Originally Posted by
cossie4i
Bad lads you two are..
06-12-2009, 05:45 PM
who has a T4 turbo? help needed
.
